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  4. Magnetically separable TiO2/FeOx/POM accelerating the photocatalytic removal of the emerging endocrine disruptor: 2,4-dichlorophenol
 
research article

Magnetically separable TiO2/FeOx/POM accelerating the photocatalytic removal of the emerging endocrine disruptor: 2,4-dichlorophenol

Yu, Jiajie
•
Wang, Tianhe
•
Rtimi, Sami  
October 5, 2019
Applied Catalysis B-Environmental

This study presents the magnetically separable TiO2/FeOx microstructure decorated with poly-oxo-tungstate (POM) leading to the endocrine disruptor 2,4-dichlorophenol (2,4-DCP) under low intensity solar light. The fastest 2,4-DCP degradation kinetics was obtained by way of the TiO2/FeOx(25%)/POM(1%) composite in acidic media. The use of magnetized photocatalysts avoids the high cost separation of the catalysts from the solution by conventional treatments after 2,4-DCP-degradation. Reactive oxygen species (ROS) leading to the 2,4-DCP degradation were identified by use of appropriate scavengers. The 2,4-DCP degradation increased with the applied light intensity (fluence rate) providing evidence for the semiconductor behavior of the composite material. FeOx/Fe2O3 infra-gap states were identified by X-ray photoelectron spectroscopy (XPS) leading to 2,4-DCP degradation. A scheme for the interfacial charge transfer (IFCT) between the oxides is suggested based on the electronic energy position of the oxides making up the photocatalytic composite.

  • Details
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Type
research article
DOI
10.1016/j.apcatb.2019.04.088
Web of Science ID

WOS:000472697500008

Author(s)
Yu, Jiajie
Wang, Tianhe
Rtimi, Sami  
Date Issued

2019-10-05

Publisher

ELSEVIER SCIENCE BV

Published in
Applied Catalysis B-Environmental
Volume

254

Start page

66

End page

75

Subjects

Chemistry, Physical

•

Engineering, Environmental

•

Engineering, Chemical

•

Chemistry

•

Engineering

•

2,4-dichlorophenol (2,4-dcp)

•

photo-degradation

•

tio2/feox/pom

•

magnetic

•

interfacial charge transfer (ifct)

•

tio2-feox intra-gap states

•

visible-light photocatalyst

•

transport-properties

•

point-defects

•

degradation

•

oxidation

•

tio2

•

fenton

•

solar

•

polyoxometalate

•

nanoparticles

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

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GPAO  
Available on Infoscience
July 9, 2019
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/158940
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